Seems like some people above definitely were notified that their 1099 was ready to download, and others not. I didn't check, yet, to see it's the case for TD, but most account apps and websites have "notifications" settings for various things like advertising, login attempts, etc. Maybe there is one for choosing to get an email regarding tax documents.
I've learned over the years that it's not in my best interest to rely on my memory of transactions over a whole year, or to solely rely on some computer system to send me information about the tax return I'll be held responsible for. So, I created a spreadsheet that is basically the 2 pages of the 1040 form, and includes a section at the bottom I have places that I fill in interest, income, dividend (qual & unqual), deductions, etc., with room to note the dates taken and any withholding amounts. It also has several tables off to the side that include the various brackets and limits for that year, that I need to watch out for. I use it in December to roughly plan out the coming year, and then during the year I make any adjustments or additional entries, and just color code the entries (use red text for proposed entries, and then change them to a different color when they have been confirmed or adjusted after the withdrawal/distribution. But I maintain a set of deposit/withdrawal ledgers for my checking and savings and IRA accounts, and Treasury Direct and brokerage basis/buy/sell ledgers, for any future needs.
Of course, it doesn't have to be as complicated as I've made mine, but I can't imagine not having a place that I enter my taxable transactions into to use when I'm shuffling through a bunch of (1099) papers and trying to make sure I've accounted for everything.