You include in the Tax Year of receipt. It doesn't matter if you...

You include in the Tax Year of receipt. It doesn't matter if you are an investor or trader.

If the divvies have franking credits, you should check the 45 day rule as to whether you can claim the franking credits or not. From Rivkin....

Franking credits can significantly increase the return on your investment, so it's worth checking to see if you qualify for them. (And, as always, contact your adviser or tax agent if you’re not sure.)
Investors are required to hold their shares “at risk” for a minimum of 45 days to receive the benefits of franking credits, which is known as the 45-day holding period rule. Here's what you need to know about this rule:

1. It doesn’t include the purchase date or the sale date. This means that you need to hold the shares for 45 days plus the date of purchase and plus the date of sale – so effectively 47 days.
2. Preference Shares have double the holding period requirement. Preference Shares are shares which entitle the holders to a fixed dividend, whose payment takes priority over that of ordinary share dividends, and they must be held for 90 days at risk to receive the benefits of franking credits (again, not including the date of purchase or sale).
3. The small shareholder exemption. If you are an individual taxpayer, the 45-day rule does not apply where the franking credits being claimed are below $5,000 for a financial year. Any other taxpayers (for example, self-managed super funds) must adhere to the 45-day holding period rule, even if the credits being claimed are less than $5,000.
4. “At Risk”. Transactions such as granting options or warrants over shares, or entering into a contract to sell shares, may have the effect of materially diminishing the investor’s risk of loss and opportunity for gain. These shares are not considered to be held at risk and therefore cannot qualify under the 45-day holding period.
5. Last-In-First-Out (LIFO). For the purposes of the 45-day holding rule only, a ‘Last-In-First-Out’ method is used when calculating whether the taxpayer qualifies for a franking credit. This can be best illustrated with an example: (more at link)

https://www.rivkin.com.au/blog/smsf...-how-the-45-day-holding-rule-works-35690.aspx