You won't be successful filing an amended return unless the you can prove that the IRS was wrong in making whatever adjustment they made. They should send a letter a few weeks after paying the refund.
It sounds like they reduced your tax refund by $1853 and then paid $61 of interest, which they are required to do if you file on time and they pay your refund more than 45 days later.
You need to understand why they reduced your refund by $1853. You are mixing the terms "rebate" and "refund" in your question but they mean different things. If you claimed a recovery rebate on line 30 of $1810, that can't be the only reason the IRS reduced your refund, if the reduction was more than the rebate you claimed. The IRS might also have reduced your refund if they think you forgot to report some other type of income, or if you claimed the wrong amount of withholding, or you claimed some other credit (like the child tax credit or earned income credit) that you were not eligible for.
As far as the rebate itself is concerned, the maximum rebate on line 30 would be $1800 for yourself, $1800 for your spouse if you filed jointly, and $1100 for each qualifying child dependent age 16 or less. The rebate will be reduced by the amount of stimulus payments you received. Your stimulus payments are reported on a letter you got after the payments, called a 1444 letter (for round 1) and a 1444-B (for round 2). If you did not put those stimulus amounts into Turbotax, the IRS will subtract them from your rebate claim. If the IRS thinks they paid a stimulus but you never received it (because of a bank account problem or something else) then you can't claim the rebate on your tax return, you have to do a trace of the original stimulus payment.
It sounds like you need to gather more information to confirm exactly what parts of your tax return the IRS changed. Unless you can prove their changes were wrong, amending won't get you anywhere, and before you can argue the changes were wrong, you have to know exactly what they changed and why.
