The IRS sent a letter saying we owed more on our 2018 taxes because they only showed receiving mortage interest from 1 bank. Can we deduct both our mortage interest?

[dhroskens]

We both had houses and sold them in November 2018 then got married and filed jointly.

[xmasbaby0]

I RECEIVED A LETTER FROM THE IRS/STATE

TurboTax does not receive any information from the IRS or your state after your return was filed, so no one at TurboTax knows about a letter you received from the IRS or the state.

(what the letters from the IRS mean)

I GOT A LETTER FROM THE IRS   

https://ttlc.intuit.com/questions/3605673-i-got-a-letter-or-notice-from-the-irs

I AM BEING AUDITED

If you purchased Audit Defense:

https://ttlc.intuit.com/questions/2924451-i-bought-max-or-audit-defense-and-now-i-m-being-audited

AUDIT SUPPORT

TurboTax has a special phone number for help with IRS/state tax letters, which will be easier than going through regular Customer Support.   At the page below, click on the blue button that says "Get Help from TurboTax Support".  Then it will ask you what tax year is your letter.  Then it will ask you what the letter concerns. Then it will show you the phone number during posted business hours.

https://support.turbotax.intuit.com/irs-notice/audit-support/

[Critter-3]

If you have proof of the interest paid then simply mail them copies of the 1098 forms to support your deduction.   If one was in the taxpayer's name and the other in the spouse's name they may have just not "married" the 2 on your return.  You may try calling the number on the notice to see if this can be corrected with a call otherwise put the proof in the mail.