Are 1099s or some other form going to be sent out for 2020 stimulus money?
A letter should have been mailed to you if you received it.
From an article I found "Find this important form if you are seeking more stimulus check money
There are a variety of reasons why people might have missed out on all or some of a first- or second-round stimulus check.
For example, they may have earned too much money when the IRS reviewed 2018 or 2019 tax returns to distribute the $1,200 check and the 2019 returns for the $600 check. Or, the payments might not account for a recently-born child. Or, if they didn’t file taxes before, they might have missed the Nov. 21 deadline to register payment information with the IRS.
All these people can seek the payment as a “Recovery Rebate Credit” when filing their 2020 returns.
To do that, the IRS says they ought to hold onto a form the agency sends out to recipients documenting the payments. There’s Notice 1444 for the first round of payments and there’s Notice 1444-B for the second one. These documents say the amount paid, how the amount was paid and how to report unreceived payments.
The IRS says it mails the notice to every recipient’s last known address within 15 days from the time it sends out the payment.
In the upcoming weeks, people who have created online accounts with the agency will be able to see the amounts they have been paid, the IRS said."