You do not have to fill out the new W-4 form if you already have one on file with your employer, nor do you have to fill out a new W-4 every year. But if you change jobs in 2020 or want to adjust your withholdings at your existing job, you’ll likely need to fill out the new W-4.Click to see full answer. Also asked, how should I fill out my w4? Step 1: Enter your personal information. In this section you’ll enter your name, address, filing status and Social Security number. Step 2: Complete if you have multiple jobs or two earners in your household. Step 3: Claim Dependents. Step 4: Other Adjustments. Step 5: Sign your form. Also Know, is there a new w4 for 2020? IRS Issues 2020 Form W-4. On December 5, the IRS issued the redesigned 2020 Form W-4 (Employee’s Withholding Certificate). The new form no longer uses withholding allowances. Instead, there is a five-step process and new Publication 15-T (Federal Income Tax Withholding Methods) for determining employee withholding. Keeping this in consideration, is it better to claim 1 or 0? If you put “0” then more will be withheld from your pay for taxes than if you put “1”–so that is correct. The more “allowances” you claim on your W-4 the more you get in your take-home pay. Just do not have so little withheld that you owe at tax time.How much should I claim on my w4?You can claim anywhere between 0 and 3 allowances on the 2019 W4 IRS form, depending on what you’re eligible for. Generally, the more allowances you claim, the less tax will be withheld from each paycheck. The fewer allowances claimed, the larger withholding amount, which may result in a refund.