The IRS only cares that you can fill out the COGS part of the tax form you file, how you track that information is up to you

Really a judgement call, if you are a large candle factory, yes definately.

Other wise I would use the periodic inventory system

There are two ways […]

Resolution for 'COGS part issue: 'Do I need to keep up with my raw materials or is the fact that I know how much each product cost to make enough?' available: Yes.

The COGS part 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 COGS part issue yourself by looking for a resolution described in the article. If it is a complex COGS part issue or you are unable to solve the issue, you may contact us by clicking here or by using other COGS part support options.

For more information about resolving issues related to COGS part in Quickbooks/QBO or to get support for the issue 'Do I need to keep up with my raw materials or is the fact that I know how much each product cost to make enough?', click the link below: