For those that qualify can apply for Lifeline. Once approved for Lifeline within PCS1, you would get a $20 discount off of your monthly plan. You can not prepay for 1 year at a time to get the discount. Instead, you must pay per month. Since you have a $20 discount, you would be able to get a free service plan if you are willing to have a lower data plan. Any multi-line discounts will apply, and then the $20 discount will be added to the plan. Your price is the final price, and required to be paid by the account holder.
You may only have one Lifeline account at a time. If you have current Lifeline services, you must cancel your other Lifeline plan, or port your number to PCS1. Once the port process takes effect, you would be able to apply for the discount, and have it apply to your plan.