Two days after the IRS published its list of EVs eligible for the federal tax credit, Rivian’s R1T truck and R1S SUV are back on. But the vehicles will only qualify for the half credit of $3,750, and only if you buy the version that costs less than the $80,000 MSRP cap. That’ll be tough, but it is technically possible. Two versions of the R1T, the dual motor with standard battery pack and the one with the larger battery, both retail for under $80,000, while only one version of the R1S will qualify.