As I suggested above, it will depend on how it is worded.
If it is specifically worded as spousal support, maintenance or alimony, then it is taxable to the recipient and deductible to the payer in the year paid/received. Even it is a lump sum instead of periodic payments.
However, in some cases the parties may agree to designate support as "not alimony" and then it is not taxable or deductible.
Any money part as part of an equitable division of assets is not alimony and is not deductible or taxable.
It may come down to the specific wording in your agreement or court order.
