Fixing minor tape blemishes/bubbling after a fresh paint job
Unless the tape is badly torn up or loose, just sand high spots and then put one or two coats of drywall compound over it. I have no experience using DAP spackle as joint compound - mostly because I'm a professional and just use joint compound for joints. Spackle is more expensive when you're dealing with large quantities.

It would make a better job to go two coats - one feathered out eight inches each way and about 1/16" thick in the middle, and then the second coat feathered out 10-12 inches. But you could get away with one coat feathered out 10-12 inches, and flattened off at 1/16" thick for the middle 4 inches or so.