1098-T Box 7 checked: how to handle, and where are instructions/explanation?

On a 1098-T with amounts only in Box 1 and Box 5,  Box 7 checked, and Box 8 checked:

1. Where in Pub 970 (or any IRS publication or any TT doc) is information related to Box 7 and ramifications of checked vs unchecked?

 

2. What adjustments, if any, is the taxpayer REQUIRED to make to amounts in Box 1 and/or Box 5 because Box 7 is checked when preparing tax return?

3. What adjustments, if any, is the taxpayer ALLOWED to make to amounts in Box 1 and/or Box 5 because Box 7 is checked when preparing tax return?

 

TIA!