Cannot file electronically because tax withheld is greater than sum of income?

I am finalizing my son's return and TT says he cannot file electronically because the tax withheld is greater than the sum of income.  He received unemployment insurance last year for several months and did not go to work because his job was closed for COVID.   Unemployment compensation is over $11K with dividends only about $40.  The income exclusion for unemployment nets to -$10,200. Tax withheld is about $1,300 and income is around $1,100 after the income exclusion. Is there no way around filing via a traditional paper return?  Is this a common occurrence in 2020 returns because of COVID rules and exclusions, etc.?  Thank you!