Those taxes and fees are insane. I pay $13.55 TOTAL in taxes and fees for my AT&T shared plan with 10GB and 5 lines of service.
The line items on my T-Mobile bill per line were:
Regulatory Programs Fee: $1.61 (flat rate)
Federal Universal Service Fund: 3.9% (variable)
Telecom Excise Tax: 13.5% (variable)
State 911: $0.73 (flat rate)
For the variable % line items, the data plans were not taxed which was good, but the $80 simple choice, $1.61 fee, and $10 each for lines 3, 4, and 5 were taxed.
So basically, the $80 plan and the first 2 lines were taxed/fee'd a total of $19.16. And each of the other 3 lines were taxed/fee'd at $4.36 each (which sucks based off $10 per line!).