And there are very few things that can be manually entered on a Form 1040 anyway. Most entries on the Form 1040 flow from other forms and worksheets.
If you say what it is that you need to enter concerning an inheritance from your late mother-in-law, someone may be able to tell you what to do in regard to the Online TurboTax interview. It may or may not be during the night, however. Fewer folks are using the forum at night.
Provide enough detail such that it's clear what you are trying to report, but do not post any personal info in this public Internet forum.