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But most of the vendors are already in QB (many of them are either referees or off duty police officers doing security work), would this affect what we’ve done from July 1 through December 31?  Say we paid John Smith $500 in the first 6 months on the old system and $300 in QB in the last 6 months.  I need a 1099 with $800 on it.  Will this do that?

Use a zero dollar expense transaction

line 1, the 1099 mapped expense account, 600
line 2, retained earnings, -600 (negative amount)

Resolution for Issue 'Started QB desktop on July 1, how do I enter vendor info from Jan 1 thru June 30 for 1099 purposes?' available: Yes (Solved).
Source: Intuit Community forum.

Started QB desktop on July 1, how do I enter vendor info from Jan 1 thru June 30 for 1099 purposes?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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