Tax Guide Everything You Need To Know About IRS 1099-K Online retailers, time to review your IRS Form 1099-K! Continuing with PDFfiller‘s review of the 1099 forms, we come to a relatively recent addition to the pack – the IRS Form ... Tax Guide Exploring Other Kinds of 1099 Forms Earlier this week we discussed the most common 1099 form, the 1099-Misc. A quick refresher: the 1099-Misc is issued for any unclassified income over $600. It is most commonly issued ...