Here are a few key tax deadlines for businesses during Q2 of 2019. APR. 1: File with the IRS if you’re an employer that will electronically file 2018 Forms 1097, 1098, certain Forms 1099 and/or Form W-2G. APR. 15: If you’re a calendar-year corporation, file a 2018 income tax return (Form 1120) or file for a six-month extension (Form 7004) and pay any tax due. APR. 30: Employers report income tax withholding and FICA taxes for Q1 2019 (Form 941) and pay any tax due. Contact us to learn more about filing requirements and ensure you meet all applicable deadlines.