This is first time using this site. I did not find a line to add my only income- social security- which is required on Wis. Schedule H.

If you only get ssi or SS or SSDI  it is not taxable and you do not have to file a return.  And there is no benefit in claiming dependents or deductions.   Unless you have federal income taxes withheld from the benefits or you get health care insurance through one of the state marketplace exchanges and receive a Form 1095-A then you need to file a tax return.

Enter a SSA-1099, SSA-1099-SM or RRB-1099  under

Federal Taxes on the left side or top

Wages and Income

Then scroll down to Retirement Plans and Social Security

Then the second line - Social Security (SSA-1099. RRB-1099) - click the Start or Revisit  button

But you probably just need to get that blank schedule H and fill it out by hand.