Retirement tax questions

That is correct.   On a joint return as long as either spouse has earned compensation as must as or more than the total contributions of both spouses, hen both spouse can contribute to a Traditional IRA - depending on  income level and if either spouse contributed to a retirement plan at work,  the contribution may or may not be deductible.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**