@arthur42  Do not amend your return until your original return has been fully processed.  The IRS gets copies of those forms, they may send you a letter asking for the information.

To amend your return:  If you used TurboTax Online, simply log in to your account and select “Amend a return that was filed and accepted.” If you used our CD/download product, sign back into your return and select “Amend a filed return.” You must file a separate Form 1040-X for each tax return you are amending.

Where do I enter an SSA-1099, SSA-1099-SM, or SSA-1099-R-OP1?

https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/enter-ssa-1099-...