You do not fill out a W-2. A W-2 is a tax document issued to you by an employer to show how much you earned and how much tax the employer withheld. YOU may fill out a W-4 for an employer to tell the employer how much tax to withhold from your paychecks.
You say that you and your spouse are both receiving Social Security----if SS is your ONLY income it is not taxable. If you have other income along with the SS, then the SS may be taxable. So......you can have tax withheld from your SS---which you must arrange through Social Security---or have more withheld from your W-2 job to help you avoid a big tax bill or underpayment penalty at tax time.
https://turbotax.intuit.com/tax-tools/calculators/w4/
https://www.irs.gov/individuals/tax-withholding-estimator
https://www.irs.gov/pub/irs-pdf/fw4.pdf
You could use Step 4 (c) to have extra tax withheld from each paycheck.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
