I used R to create a method to reconcile investment accounts' position cost basis in locally installed Quicken versus the cost basis per my brokerage's online w

I used R to create a method to reconcile investment accounts' position cost basis in locally installed Quicken versus the cost basis per my brokerage's online website. Some minor manual effort required. The effort turned up a systemic weakness across the whole of the US for stock position transfers when a dividend is retroactively reclassed as return of capital. At an individual level, this system problem causes tax obligation calculation errors. Repeat this across all taxpayers who transferred such stocks in the first 1-3 months of a year.