Hi @Raza Rizvi . Two different timelines at play here.
1. You need to place your recently realized capital gains into a QOF within 180 days of realization to secure the deferral and eligibility for other OZ benefits. Based on the August sale, this gives you til late Jan-mid Feb 2020 to create the fund. Creating before the end of 2019 opens the door for a 15% exclusion on your deferred capital gain, whereas that exclusion would be capped at 10% if you wait until early 2020 to create/invest in the fund.
2. Once your money is in the Opportunity Fund, a new clock starts for deploying 90% of the capital in Opportunity Zone property or an Opportunity Zone Business. The first test is 6 months after the fund is created or December 31, whichever comes first. BUT, the regulations allow a QOF to exclude recently contributed capital from the first testing date. So if you create the fund in NOV/DEC 2019, you won’t have to satisfy the 90% asset test until June 30, 2020. If you create the fund in January, you won’t have to satisfy the 90% test until December 31, 2020.
You can use a second-tier entity to stretch your timeline even further, but that’s probably outside the scope of your question.