So, the IRS sent out these payments. You were entitled to $1,400. Two things could have happened. You either received it or you didn't. If you received it, answer "yes" to the question asking if you did. If you did not receive it, answer "no" and it will be added to your refund.
The IRS is sending you (and everyone else) letters stating how much if any, they received. They are saying you got $1,400. Checking your bank statement will prove this to be true or false. If you said you got it when you didn't actually receive it, you need to amend your return to receive it. If you said you didn't get it, but actually did, the IRS will adjust your return.
