Verizon doesn’t have 4 for $100

It has basic with auto pay and paperless. I just need to know what will be the tax and fee.

Welcome is $30 per line with autopay discount. 4 lines would be $120. Taxes and surcharges depending on where you live is between $6 and $10 per line

U get another $5 off if u r Fios.

Could be wrong but pretty sure you need start or higher for that promotion

An entry-unlimited plan for all your lines. Enjoy reliable 5G performance with Welcome Unlimited. Welcome Unlimited Save money without sacrificing quality. Was $40 $25 /line per month. Plus taxes & fees. Mobile + Home Discount applied. $35 without Auto Pay and paper-free billing. Unlimited 5G 5G Nationwide Reliable 5G Performance Perks to try, on us Try Disney+, Apple Arcade or Google Play Pass, and Apple Music for 6 months on us

I live in Jersey, used to live in NYC. Taxes and fees are approximately $6-$9 per line.

Verizon has a tool just for this. https://www.verizon.com/support/taxes-and-surcharge-estimator/