Don’t worry about it. The worst that will happen is you have more money withheld than needed, which means you get the excess back as your tax refund.
You should see up to 4 taxes withheld from your pay. FICA or social security is a flat 6.2%, that goes toward your future retirement or disability payments. 1.45% Medicare tax, sometimes labeled OASDI, pays for Medicare insurance for people over age 65. Federal income tax and state income tax, if you live in a state with income tax. These two taxes go up with your income so on a low week you might have nothing withheld.
You file one tax return at the end of the year which reports all your income for the year from all of your jobs, and calculates the total tax you owe. You get credit for the tax that was withheld, and if the withholding is more than your tax bill, you get the difference back as a tax refund, and if the tax that you owe is more than what was withheld, you owe the difference as a payment. The withholding system is set up so that most people get a refund.
When you work two jobs at the same time, you have to check the two job box on the W-4 to make sure that you have enough tax withheld from both jobs. If you think you might end up working both jobs at the same time if Panera calls you back eventually, then leave the W-4 alone. The worst that would happen is that you would have too much tax taken out and you would get it back as a refund later. If you end up only working one job, you can file a new W-4 with the current job, and you might get less withheld and more to take home, and then a smaller tax refund.
