If the alimony is the only type of income that you receive for the entire year and you are filing as Single, then you do not need to file a return since your taxable income is less than your Standard Deduction.
Provided you do not have health insurance through one of the state Marketplace Exchanges or from healtcare.gov and do not receive a Form 1095-A. If you do receive a Form 1095-A for health insurance then you will need to file a tax return.
Standard deductions for 2023
Single - $13,850 add $1,850 if age 65 or older
Married Filing Separately - $13,850 add $1,500 if age 65 or older
Married Filing Jointly - $27,700 add $1,500 for each spouse age 65 or older
Head of Household - $20,800 add $1,850 if age 65 or older
