Mortgage Interest

For 2018 Taxes, I entered the Box 1 amount from a 1098, together with other requested information from the same 1098, but when I continued to the next page, there was a message which said that since the amount from the 1098 was different than what I actually paid, I had to supply additional info. How could this be true, number 1, and how does TurboTax know what I paid? Without going through the entire year's mortgage payment statements (which I presume TT doesn't have) is there somewhere that I entered an amount that I thought I had paid? I do not want to obtain the payment info, and what the heck would I do about the difference (in my benefit or the Mortgage company's benefit). How do I get out of this corner and proceed. I have three more interest payment 1098's to enter to proceed.