If I cant pay for a tax return for two separately years of 2018 and 2019 when i dont have no job at the time and i only get help from the government of only 221?

If I cannot pay or so do the process of paying on turbotax cause I dont have enough money to pay for both of my tax return for 2018 and 2019 but I need to do and file a 2018 but I dont have the money to pay for the cost of it if its alot