The answers to the clues below will have something in common>

1. Medical frauds
2. New York cabbies
3. Praise lavishly, as in poetic
4. Library shelves
5. Supports
6. Hunts down
7. Wolf, dog, and chewing gum units
8. Apple products
9. Football feats
10. Natural talents
11. Equips a horse
12. World War II Army members
13. Sales, Property, or Inheritance
14. Strains mightily, as brains
15. Engraved tributes or memorials
16. Noisy kisses
17. Dressy trousers
18. Humble dwellings
19. Spice shelves and deer antlers
20. Soundly defeats, informally

Answers:

1. Quacks
2. Hacks
3. Wax
4. Stacks
5. Backs
6. Tracks
7. Packs
8. Macs
9. Sacks
10. Knacks
11. Tacks
12. WACS
13. Tax
14. Wracks
15. Plaques
16. Smacks
17. Slacks
18. Shacks
19. Racks
20. Shellacs

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
TAX-TIME RHYMES (adapted)