Should I file a joint return when my husband's only income is social security and he does not have to file?

Yes you should file a joint return. You must include his social security income on your joint tax return even if your total income is low enough for no taxes to be owed on it. 

@missgwee - agree with all the advise above.  and this is why filing separate is a 'bad idea:

if you don't file "joint", then YOU have file "Married- Filing Separate" in which case your standard deduction is only half what it would be by filing "joint" AND you income is subject to a higher tax bracket.  You'd pay more tax than filing joint on the same income. 

Further, because you are filing "separate" (and presumably you two lived together for any part of 2022),  HALF of his social security is AUTOMATICALLY considered part of his gross income - that is a special IRS rule for determining how much of social security is taxable when filing separate and still living togeher.  if his social security income is greater than around $33,750, (which would mean his adjusted gross income would be over the standard deduciton of $14,350), he would have a filing requirment and some of his social security income would be taxed.  (the rule disincents married couples from filing 'separate'!

It is always allowed for a married couple to file jointly even if one spouse does not work or has very little income, or their income is only from Social Security. Married filing jointly almost always results in the lowest overall tax or largest overall refund.  Your spouse’s Social Security may be partly taxable depending on your total combined income.

Furthermore, as mentioned, if you file separately, then your spouse must file separately and their Social Security becomes taxable; they may pay more tax on their Social Security income by filing separately than if you filed jointly.