IRS My Account
The IRS has an online portal where you can view and download information for any income and/or tax credits that you have received. Some of the forms you can find on the portal include Letter 6419 (for child tax credit payments) and Letter 6475 (for the third economic stimulus payment).
Please follow the link below to create an account to view your forms.
IRS My Account - ID.me
**If you have signed up with the IRS before, you may need to re-register with ID.me.**