In 2020 Peruvian authorities allowed visitors to change their Machu Picchu entry tickets purchased for entry in 2020. And tour operators could change Inca Trail permits purchased in 2020. I've included a link to the new Machu Picchu website and other tips to help you navigate your way through the process of canceling or changing your trip to Peru.

This is an unprecedented opportunity to perhaps salvage some of your expenses if you cancelled a trip to Machu Picchu in 2020. The borders of Peru were closed and train service to Machu Picchu was suspended on March 17, 2020 due to the Covid19 pandemic.  Machu Picchu finally reopened for local travelers in November 2020 and for foreginers in December 2020 when international flights were restored. As of June 2021 Machu Picchu and the easy 1-day Inca Trail hike are reopen at reduced capacity. It was announced in June 2021 that the 4-Day Inca Trail will reopen on July 15, 2021.

Is Machu Picchu Reopened After Covid? Follow this link to get details about tickets and new rules 

To find out the process of rescheduling your entry tickets to Machu Picchu and your train tickets from trips planned in 2020 please visit the website where you purchased your tickets to see message windows with instructions on the home page. It might be possible to recover most of the cost of getting to and from Machu Picchu from Cusco, Peru. Hotels and international flight reservations are a separate issue but they tend to have more flexible cancellation policies. More so than services provided by local concessions. 

Can US-Bound Travelers get a covid test in Cusco?

Yes, there is a clinic in Cusco offering covid tests with next day results. Here is a link to the page with all the details. Beginning, January 26, 2021, all travelers arriving in the US are expected to present a negative covid test prior to boarding their flight from Peru. It is not possible to get a covid test at the Lima airport. 

Machu Picchu launched a new website in July 2020. The old website is gone. Here's the link to the new Machu Picchu website refund instructions for processing ticket changes and refunds. On October 19, the Machu Picchu website offered entry tickets online. And in January 2021, Machu Picchu entry tickets are available through December 31, 2021.

In the case of free (Independent) visitors, they are required to send an email to callcenter@culturacusco.gob.pe specifying the reservation code and requiring the date and / or data (full name and document number - usually the same passport you made the reservation with) of each visitor in your group. 
(I'm providing this message as a courtesy. It is subject to change)

Tour operators will change Inca Trail permits on request. 

What if you're not sure about your new travel dates? Should you change your Inca Trail permits?

Tour operators can submitt documents to change their confirmed Inca Trail hikes in 2020 but it is only possible to confirm new hiking dates if the Inca Trail Hike reservation system is fully functional.  Permits for the easy 1-day Inca Trail hike can be reserved for any available date in 2021. Adios Adventure Travel is accepting reservations now for both the 1-day and the 4-day Inca Trail hikes in 2021. Follow this link to see info about booking the Classic 4-day Inca Trail hike. And as of June 2021, it was announced that the 4 and 5-day Inca Trail hike will reopen on July 15, 2021. 

Can you get an actual refund for the Machu Picchu ticket or Inca Trail permit?

The notice on the government website indicates that a full refund for Machu Picchu entry tickets can be initiated in person or electronically. Most tour operators are offering to reschedule Inca Trail hikes in 2021. I'm not aware of any refunds for hiking permits.

Can you get a refund for your bus tickets?

For anyone who purchased bus tickets directly from Consettur bus company, for service between Aguas Calientes and Machu Picchu, their website indicates that you can ask for a change of date or get a refund. Follow link to Consettur website here.

What about Latam Airlines flights?

Many passengers have reported that they were able to get refunds or reschedule their flights for later dates. In case you haven't heard, Latam Airlines filed for Chapter 11 bankruptcy protection. But this should not affect customers, although it is reasonable to expect fewer flights. The circumstances around the Latam bankruptcy are very different from Avianca Airlines bankruptcy. I've provided links to both pages where I described each situation.

Did Avianca Airlines file for bankruptcy? 

Yes, they filed for Chapter 11 and are making changes to the structure of the company. Here's a link to more details about the cutbacks in Peru.

Keep in mind that a pandemic event of this proportion has never happened before, and everyone, including small and large companies, are figuring things out as they go. It's possible that refund and reimbursement policies could change. It's worth to keep checking back and asking.

"Be kind, even on your bad days."