As reported July 1, for those who like to follow news and not rumors:

A few months into the IRS bringing employees back into offices across the country in a phased approach, Commissioner Charles Rettig said agency facilities will return to “full staffing” by July 15, and will prioritize tax return refunds and customer service through its call centers.

By that point, the IRS will reopen all of its processing and call centers, although Rettig said that it will require employees in some cases to work different shifts in order to meet social distancing requirements.

https://federalnewsnetwork.com/workforce/2020/07/irs-commissioner-expects-full-staffing-at-tax-proce...